Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 0 5:30
1980 0 2:00
1981 16 143:25
1982 4 100:04
1983 19 76:05
1984 22 157:55
1985 6 193:05
1986 5 180:40
1987 4 99:15
1988 3 216:00
1989 45 269:46
1990 16 262:45
1991 19 405:47
1992 15 645:00
1993 40 397:58
1994 9 286:00
1995 263 224:45
1996 21 325:15
1997 121 356:45
1998 26 339:30
1999 29 267:15
2000 7 261:30
2001 31 524:35
2002 36 526:15
2003 6407 567:15
2004 175 455:05
2005 267 601:15
2006 150 389:55
2007 1642 432:55
2008 103 525:55
2009 287 399:05
2010 119 249:40
2011 211 319:15
2012 30 231:35
2013 810 270:55
2014 29 291:35
2015 76 177:30
2016 42 230:15
2017 3 250:05
2018 18 318:16
2019 140 584:19
2020 124 587:17
2021 230 539:42
 
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